Title :
Tunable Optoelectronic Oscillator Based on a Polarization Modulator and a Chirped FBG
Author :
Tang, Zhenzhou ; Pan, Shilong ; Zhu, Dan ; Guo, Ronghui ; Zhao, Yongjiu ; Pan, Minghai ; Ben, De ; Yao, Jianping
Author_Institution :
Microwave Photonics Res. Lab., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
A wideband-tunable optoelectronic oscillator (OEO) is proposed and experimentally demonstrated based on a tunable microwave photonic filter (MPF) consisting of a polarization modulator, a chirped fiber Bragg grating, and a polarization beam splitter (PBS). By simply adjusting the polarization state of the signal before the PBS, the center frequency of the MPF is tuned. The proposed OEO is experimentally demonstrated. A high-purity microwave signal with a tunable frequency within 5.8-11.8 GHz is generated. The single-sideband phase noise of the generated signal is -104.56 dBc/Hz at 10-kHz offset.
Keywords :
Bragg gratings; microwave filters; microwave photonics; optical beam splitters; optical fibre filters; optical fibre polarisation; optical modulation; optical noise; optical tuning; oscillators; phase noise; MPF; OEO; PBS; chirped FBG; chirped fiber Bragg grating; frequency 5.8 GHz to 11.8 GHz; high-purity microwave signal; polarization beam splitter; polarization modulator; polarization state; signal generation; single-sideband phase noise; tunable frequency; tunable microwave photonic filter; wideband-tunable optoelectronic oscillator; Fiber gratings; Frequency modulation; Microwave filters; Microwave oscillators; Microwave photonics; Microwave generation; microwave photonics; optoelectronic oscillator (OEO); polarization modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2205235
